Engineering Entrance Exam

You can opt for the NEST exam, if you have interest in research work or you can opt for the Indian statistical institute. These are also two good colleges and exam for the entirely different stream that is known by very less students pursing to do B.Tech.

Yes, you can easily get CSE branch in AP campus, but in other campus it is not possible.

With this rank, it is bit difficult for anyone to predict that, as it may be possible that in JEE Mains your performance is not that much good as that much you have studied and you might have done better in VITEEE, so it is difficult to predict.

Sorry, but here is no chance for less than 75%. It's an strict rule. You can try for private colleges.
Best of luck for future.

Power electronics - P. S. Bhimhra
Power system - Nagrath kothari
Electrical machines - P. S. Bhimra
Networks - Valkenburg (Madeeasy notes are sufficient)
Control system - Madeeasy notes (B. S. make, nagrath kothari)
Analog - Bolyested
Signal and system - Madeeasy notes
Op-amp, filters etc. - D. Roy Chaudar

One Year and 4 hours daily is more then sufficient to prepare for the GATE. In the beigning select your weak and strong topics. Start from your strong topics as you need motivation in the beginning. So cover your strong subjects first then gradually move to the other subjects. Solve questions regula

Ace Academy and GATE Academy. And basically, it whole depends on your practice.

The best places in Gujarat to do engineering is given below
1 NIT Surat, DAIICT (best college in Gujarat)
2 IIT Gn
3 Institute of Technology, Nirma University PDPU, Gandhinagar 4MSU, LDCE,
5 IITRAM, GCET BVM. DDIT, VGEC, SVIT
Generally cutoff for these colleges are high, so if you can't get into them C

Well, for 2018, the eligibility score in B.Tech from biotechnology for GATE exam is 38.9 for general category, 35.0 for OBC category and 25.9 for SC/ST/PwD candidates. On the other hand, for TANCET there are different eligibilities for different courses if you are going to opt after B.Tech. For exam

I'll prefer you to opt for the automobile engineering, as this branch has better scope than mechatronics as well as the pack of automobile branch is far better than this branch in SRM.